This thesis connects monopoly, as one of the extremes of market structures studied by modern economics and organizational structure. Monopoly, as a form of imperfect competition, implies the existence of a dealer or manufacturer with total control over the entire manufacturing sector, during which there is no close substitute, and access to the new manufacturer has been disabled. The best-known form of monopoly is a natural monopoly that occurs due to economies of scale, while bilateral monopoly which is rare in practice means the market with only one seller and one buyer. The organization allows the realization of specified task, extends human capabilities of which creates a social force, accelerates the process of carrying out the tasks and, what is especially important, with the appropriate organization relatively are reduced consumptions of labor and materials to achieve the same results .. The importance of the structure for the organization is difficult to explain, it is a fundamental part of its, as well as anatomy in humans, and is called the anatomy of the organization. For example of monopoly and organizational structure was taken Zrinjevac company that was engaged in communal activities with maximum environmental protection. The company designs and maintains public and other green areas, playgrounds, and sports and recreation facilities. In Zagreb is a unique company with no competition, that operates effectively in order to achieve public interest and the wellbeing for the citizens of Zagreb. Such a monopoly position allowed him by the City of Zagreb which is the owner of the company. It operates with a positive result and responsibly perform his duties, executes payments and respects the principles of business. The company Zrinjevac is a dynamic company that base their operation on a high level of cooperation between functions and departments, and represents a fluid system employees who cooperate with each other depending on the business problems and tasks faced. In its operations, uses the functional organizational structure.